1 /*
2  * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4  *
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8  *
9  * This code is distributed in the hope that it will be useful, but WITHOUT
10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12  * version 2 for more details (a copy is included in the LICENSE file that
13  * accompanied this code).
14  *
15  * You should have received a copy of the GNU General Public License version
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17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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23  */
24 
25 package sun.jvm.hotspot.oops;
26 
27 import sun.jvm.hotspot.debugger.Address;
28 
29 /** A DefaultMetadataVisitor implements basic no-op MetadataVisitor
30     functionality except that the setObj() and getObj() methods are
31     implemented properly. */
32 abstract public class DefaultMetadataVisitor implements MetadataVisitor {
33   private Metadata obj;
34 
prologue()35   public void prologue()                        {}
36 
37   // Called after visiting an object
epilogue()38   public void epilogue()                        {}
39 
setObj(Metadata obj)40   public void setObj(Metadata obj) {
41     this.obj = obj;
42   }
43 
getObj()44   public Metadata getObj() {
45     return obj;
46   }
47 
48   // Callback methods for each field type in an object
doMetadata(MetadataField field, boolean isVMField)49   abstract public void doMetadata(MetadataField field, boolean isVMField);
doOop(OopField field, boolean isVMField)50   public void doOop(OopField field, boolean isVMField)         {}
doOop(NarrowOopField field, boolean isVMField)51   public void doOop(NarrowOopField field, boolean isVMField)   {}
doByte(ByteField field, boolean isVMField)52   public void doByte(ByteField field, boolean isVMField)       {}
doChar(CharField field, boolean isVMField)53   public void doChar(CharField field, boolean isVMField)       {}
doBoolean(BooleanField field, boolean isVMField)54   public void doBoolean(BooleanField field, boolean isVMField) {}
doShort(ShortField field, boolean isVMField)55   public void doShort(ShortField field, boolean isVMField)     {}
doInt(IntField field, boolean isVMField)56   public void doInt(IntField field, boolean isVMField)         {}
doLong(LongField field, boolean isVMField)57   public void doLong(LongField field, boolean isVMField)       {}
doFloat(FloatField field, boolean isVMField)58   public void doFloat(FloatField field, boolean isVMField)     {}
doDouble(DoubleField field, boolean isVMField)59   public void doDouble(DoubleField field, boolean isVMField)   {}
doCInt(CIntField field, boolean isVMField)60   public void doCInt(CIntField field, boolean isVMField)       {}
61 }
62